Machine for turning carriage-bows



(No Mod'l.) 2 Sheets Sheet 1.

' JOSIAH W. & JOHN W. SHERWOOD.

MACHINE FOR TURNING GARRIAGEBOWS. 1 No. 364,682; 7 Patented June 14. 1887.

J ammwtow N PETERS. Plwloutho n her. Wilhi n nnnnn C.

(No Mod l.) 2 Sheets-She'et 2.

JOSIAH JOHN W. SHERWOOD.

. MAGHINEJPOR TURNING CARRIAGE Bows.

No. 364,682. Patented June 14, 1887.

UNITED STATES PATENT. OFrIcE.

JOSIAH W. SHERWOOD AND JOHN W; SHERWOOD, OF GRAND RAPIDS, MICHIGAN.

MACHINEIFOR TURN'lNG CARRlAGE-BOWS.

SPECIFICATION forming part of Letters Patent No. 364,682, dated June 14, 1887. Application filed January 8, 1886. Serial No. 188,040. (No model.)

To ([ZZ whom it may concern.-

Be it known that we, J OSIAH W. SHERWOOD and JOHN W. SHERWOOD, citizens of the United States, and residents of Grand Rapids,

ism for slowly rotating the material while in contact with said cylinder, and also guiding said material so that it will be cut to the required form or uniformly polished by the sandpaper.

The objects of our invention are to provide means whereby the machine may be readily adapted for eitherforming the material by means of cutting-knives or sandpapering the material after the forming; also, means wherebythe material may be prevented fro m springing away from the cutter or sand-paper; also, to provide means whereby the machine may be readily adapted to operate upon a variety 'of forms,as will more fully appear hereinafter.

We obtain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure l is a vertical section of the machine. Fig. 2 is a section at rightangles to Fig. 1,with the frames G G broken away. Fig. 3 shows a cylinder arranged with knives for forming the material. Fig. 4 is an end view of the same. Fig. 5 is a detail view of the spindle or center with cam attached. 'Fig. 6 is a perspective View of a pair ofparallel backingr'olls and flexible bearings for the same, and Fig. 7 shows detail views of different forms ofcams.

Within a suitable frame, A, is suspended a cylinder, B, provided with the usual shaft, a, rotating in suitable boxes, and having a driving-pulley, I), attached. Said cylinder is also provided with the usual means of attachingsand-paper to its surface, and a casing, a, and

a pipe, a for conveying away chips and dust.

Across the top of the frame A is supported a shaft, 0, which supports the arms D D, and the pulleys E E, upon which they are all free to rotate, the pulleys being firmly attached to each other. In the lower end of the arm D is journaled a back spindle, 0, provided with either a square or spur point, f. Said spindle is alsoprovided with a suitable cam, e, secured to the spindle by a screw, 0, and is connected near its outer end to a lever, g, whichis forked at both ends and fulcrumed to a short arm, 9, on the arm D, the lever-'g having attached to its opposite end a rod, h, passing through a spring, Z, which maintains back spindle, c, in its normal position. Formed on the end of rod h is a ring, it, for drawing back the said rod, and thereby actuating lever g, which with draws from the material the back spindle, c, and thus releases the said material when required. Onthe outer end of spindle c is secured a pulley, d", which, through belt-K and pulley E", (on shaft 0,). imparts motion to the said spindle. I

Journaled in the lower end of the arm D is a suitable driving-spindle, 0, having at its outer end a pulley, (Z, and near its inner end a detachable earn, 0, secured to the said spindle a bye. screw, 6', (similar to screw e of cam 0,) and of a form to correspond with the end of the completed slat. The said spindle c terminates at its inner end either in a suitable spur, f, or a plug, f, to hold and rotate the material. Pivoted to suitable lugs on the frame A are retaining-hooks d (P, which pass over and hold, allowing slight play, the lower ends of the arms DD. Swinging on the lower ends of thearms D D (or, if convenient, to the shaft 0) are-two other arms, F F. To the lower end-of each swings by a pivot, j a yoke, G, having arms jj,swinging on pivotsj, the said arms j j being slotted to permit the passage and suitable play of rods Z Z", which also pass through springs Z 1, which, by their tension exerted against the arms j j, serve to maintain the rolls k k in contact with each other.

H H are guide-posts'having curved outer surfaces to correspond with the periphery of the cylinder B, and are secured by bolts on m passing through slot-ted holes, as shown in dotted lines, Fig. 1, and are adjustable in a direction at right angles to the axis of the said cylinder by means of hand-screws n a. Against the faces of the said posts H H the cams e e, which are secured to the spindles c c by set-screws c, revolve, (through the medium of shaft (1,) and they impart an oscillating mot-ion to the parts suspended from the arms D D and F F. The said cams are of such form as illustrated in Fig. 7, in which i represents a disk which is used when a slat of circular form is needed; 2, a cam when one of hexagon shape is required; 3, an elliptical form; 4,51. triangular shape'with curved sides, and 5 shows a convene-convex outline. Other forms will suggest themselves as occasion may require.

The arms F F are connected to the treadle I in any suitable manner, that shown in Fi 1 representing only one side of the machine, and consists ofa cord, 0, attached at one end to the end of the arm F", passing over a p nlley, p, and fastened at the other end to the said treadle, which, on being depressed, lifts the arm F and its attachments from the cylinder B. Asimilardevicc on the opposite side of the machine controls arm F. The said arms F F are also attached to the arms 1) D by means of the cords 0", which admit of a slight separtion of the arms D D and h Motion is imparted to the spindles c c from the shaft a by means of the belts K K K and pulleys E, E, d, E and (1, arranged as shown. By such arrangement the belts do not inter fere with the movements of the arms, and are kept tight regardless of the position of said arms. v

Figs. 1 and 2 show the cylinder B with a sheet of sand-paper, :0, attached, as shown, when the said cylinder is to be used for sand papering. Figs. 3 and 4. show the cylinder B arranged with spiral knives for forming the slat from the blank.

The cylinder B, Figs. 3 and 41, is preferably of cast-iron,'with a turned surface having chan nels r r, in which are knives s s. Said channels are hollowed in front of the knives, as shown, to allow the chips to escape. Said knives and channels are arranged spirally on the surface of the cylinder 13, so that the material will at all times have a bearing against the turned surface of said cylinder.

The operation of our devices is as follows: Having the cylinder 13 in the machine and cams of suitable form on spindles c c, a suitable piece of material is adjusted between the said spindles, the guide-posts are drawn forward by means of the handscrews n n, and the machine is set in motion. A slow rotary mo tion will be imparted to the said piece of ma terial, together with the spindles, and the cams, resting upon the guide-posts, will cause the arms D D and all parts attached to oscillate according to their form and position. As the guide-posts are run back by the hand-screws the knives on the cylinder B will cut away portions of the material until the bolts at stop the movement of said post by coming in contact with the ends of the slots in which they move, the result being that the material will conform throughout its length to the shape'of the cams used, and be of a form defined by right lines drawn from end to end and parallel with the axis. On completion of the work the retaining-hooks (2 d are thrown back and the finished slat is removed.

If desired, the posts may remain stationary and the material rest against the turned surface of the cylinder until the cams come in contact with the posts, the spiral form of the knives preventing jar and heavy strains upon the material, for the reason that they begin to cut at one end first. As the axis of the material is parallel with that of the cylinder, the spiral form of the channel and knife prevents the material from catching in the said channel.

The rolls 7; 7.: rest upon the material in two lines parallcl'to and nearly opposite the cylinder B, and preventjarring and springing of the material. By thearrangemeut of the pivoted yoke, arms, and springs described each roll is free to follow the surface of the material regardless of its form. \Vhen the forming operation is completed, the hooks d d are thrown back and the treadle I is depressed, which first lifts the rolls from the material and then the material from the cylinder, when the material can be removed by withdrawing the spindle c by means of the rod [1. The sandpapering operation is substantially the same, except that the cylinder B, as described, is used.

\Vhat we claim and wish to secure is as follows:

1. The combination of the cylinder B, the supporting-arms D D, carrying the spindles c c, cams c c, in conjunction with the curved guide-posts H II, handscrcws a a, and retaining-hooks dd, as shown and described.

2. A rotating cylinder having attached either sand-paper or knives, in combination with the rotating spindlesc c, for holding and rotating the material to be operated upon, and rolls 7; k, adjusted in spring-bearings and independent of each other, arranged to prevent the said material from springing, substantially as described.

3. The combination ofthe guides 11 H, handscrews a n, spindles c c, cams e c, and yielding rolls It is, arranged to prevent the material from springing, all serving to maintain the said material in position while being operated upon, as shown and described.

4.. The spindles c 0, adapted to hold and rotate the material, and a cuttingcylinder adapted to operate upon the said material, in combination with the rolls k k, the arms D D, and retaining-hooks adapted for temporarily holding the said. arms and the material in position, substantially as described.

5. The combination ofthe arms D D, F. F, the pivoted yokes G G, having the pivoted slotted arms j j, springs Z Z, rods Z Z and rolls 76L, independent of each other, as shown, and for the purpose described.

JOSIAH \V. SHERWOOD. JOHN \V. SHERWOOD. Witnesses:

L. V. MoUI/roN, A. H. Snnnwooo.

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